using System;

namespace Task6
{
    class Program
    {
        static void Main(string[] args)
        {
            bool check = true;
            bool test = false;
            int n = Convert.ToInt32(Console.ReadLine());
            int k = Convert.ToInt32(Console.ReadLine());
            string str = Console.ReadLine();

            if (str.Contains("?"))
                test = true;

            string minstr = str.Replace("?", "1");
            string maxstr = str.Replace("?", "9");

            int num = Convert.ToInt32(k * (Math.Floor(Convert.ToInt32(minstr) * 1.0 / k)));
            char[] numMas;

            for (; ; )
            {
                if (test && (num > Convert.ToInt32(maxstr)))
                {
                    Console.WriteLine(-1);
                    break;
                }

                numMas = num.ToString().ToCharArray();

                for (int i = 0; i < str.Length; i++)
                {
                    if (numMas[i] == '0')
                    {
                        check = false;
                        break;
                    }

                    if ((str[i] != '?') && (str[i] != numMas[i]))
                    {
                        check = false;
                        break;
                    }
                }

                if ((str.Length == numMas.Length) && check)
                {
                    Console.WriteLine(num);
                    break;
                }

                if (num > Convert.ToInt32(maxstr))
                {
                    Console.WriteLine(-1);
                    break;
                }

                check = true;
                num += k;
            }
            Console.ReadLine();
        }
    }
}